Vol. 11, Special Issue 5 (2022)

Author(s):
Jaya Sai Deepika Konda and Ashwani Kumar

Abstract:
A field experiment was conducted during kharif 2021 at Central Research Farm, SHUATS (Sam Higginbottom University of Agriculture, Technology and Sciences), Prayagraj, Uttar Pradesh (India). Field efficacy of Spinosad with six biopesticides were evaluated against pod borer, (Helicoverpa armigera) of Cowpea and two foliar applications were given. The efficacy results showed that the reduction per cent of larval population in Spinosad 45 SC (65.48% and 80.40%) found most effective followed by HaNPV 450LE (61.05% and 86.79%), Neem oil 5% (58.34% and 85.74%), Karanj oil 2% (55.89% and 83.98%), NSKE (52.69% and 80.90%) and Dhatura leaf extract (49.46% and 79.07%) was next effective treatment. Among all the treatments Tobacco leaf extract (46.66% and 76.76%) was found least effective but comparatively superior over the control Water spray (0.00%). The best and most economical treatment was Spinosad (1:214), followed by HaNPV (1:1.96), Neem oil (1:1.74), Karanj oil (1:1.54), NSKE (1:1.63), Dhatura leaf extract (1:1.27), Tobacco leaf extract ( 1:1.17) as compared to control (1:1.12). The highest yield was recorded in Spinosad (16.18 q/ha) followed by HaNPV (14.91 q/ha).